<template>
  <!-- 头部部分 -->
  <header class="header">
      <h1>todos</h1>
      <input class="new-todo" 
      @keydown.enter="hAdd"
      v-model.trim="taskName" placeholder="请输入任务名称" autofocus />
    </header>
</template>

<script>
export default {
  name: 'TodoHeader',

  data() {
    return {
      taskName :''
    };
  },
  methods: {
    
    hAdd() {
      if(this.taskName=== '') return alert('请输入数据')
      this.$emit('add',this.taskName)
      this.taskName =''
    }
  },
};
</script>

<style lang="scss" scoped>

</style>